the cia stopped an al qaeda plot in yemen to blow up a plane bound for the u.s. has the arabian peninsula become a stronghold for the terrorist group? >> for the first time, we see al qaeda actually trying to hold territory. >> in an exclusive report, frontline examines the new al qaeda threat. >> this is al qaeda, and they control the whole city. >> "al qaeda in yemen." >> frontline continues online. explore the reporting on "cell tower deaths" from our partners at propublica, more about who's responsible for a worker's safety from osha's jordan barab, and read at&t's statement to frontline. get insights into working at mf global from a former broker. >> sipping the kool-aid at that time. >> learn more about the volckr rule, and follow frontline on facebook and twitter, or tell us what you think at pbs.org/frontline. >> frontline is made possible by contributions to your pbs station from viewers like you. thank you. and by the corporation for public broadcasting. major funding is provided by the john d. and catherine t. macarthur foundation, committed to buildin